The boys all laughed at this, but the professor was perfectly serious.

There is no doubt that he would have liked to have done so and caged up a Patagonian where he could have studied him at his leisure.

The Brutus, with leadsmen stationed in her bows to test the depth of the water, proceeded cautiously up the river and finally came to anchor with her tow behind her about two miles from its mouth. The work of shifting some of the cargo of the Southern Cross to the stern so as to elevate her bow, was begun at once; as time was an important consideration. Soon all was declared ready for the carpenters to start work and they were lowered on stages over the side and at once began to rectify the trouble. Some of them worked from a boat secured to the bow.

"Do you think you can persuade the captain to let us go ash.o.r.e with you?" asked Frank of the professor, who was busy at once getting out all his paraphernalia in antic.i.p.ation of going on what Billy called "a bug hunt."

"Certainly," declared the scientist confidently, "come along. I should like above all things to have you boys go ash.o.r.e with me. Besides, I may teach you all to become faunal naturalists."

The delighted boys followed the old man to Captain Hazzard's cabin, but, to their disappointment, he forbade the expedition peremptorily.

"The Patagonians are dangerous savages," he said, "and I will not a.s.sume the responsibility of allowing you to risk your lives."

Nor did any persuasion of which the boys or the professor could make have any effect in causing the commander to change his mind. He was firm as adamant and reluctantly the boys made their way forward and watched the carpenters fix the leak, and when that palled they were compelled to fall back on fishing for an amus.e.m.e.nt.

The professor joined ardently in this sport despite his disappointment at not being allowed to go ash.o.r.e. He managed to fix up a net attached to an iron ring with which he scooped up all kinds of queer fish out of the river, many of which were so ugly as to be repulsive to the boys. But the professor seemed to be delighted with them all.

"Ah, there, my beautiful 'Piscatorius Animata Catfisio,'" he would say, as he seized a struggling sea monster with a firm grip and plunged it into one of his tin tanks. "I'll dissect you to-night. You are the finest specimen of your kind I have ever seen."

The boys were suddenly interrupted in their fishing by blood-curdling yells from the old scientist. Looking up in alarm they saw him dancing about on the deck holding his arm as if in great pain, while in front of him on the deck a queer-looking, flat fish with a long barbed tail flopped about, its great goggle eyes projecting hideously.

Frank ran forward to pick up the creature and throw it overboard, but as he grasped it he experienced a shock that knocked him head over heels. As he fell backward he collided with the professor and the two sprawled on the deck with the professor howling louder than ever.

"No wonder they're hurt," shouted Ben Stubbs, coming up with a long boat-hook, "that's an electric ray."

"An electric what?" asked Billy.

"An electric ray. They carry enough electricity in them to run a small lamp, and when they wish they can give you a powerful shock. They kill their prey that way."

"Ouch--," exclaimed the professor, who had by this time got up, "the ray nearly killed me. Let me look at the brute so that I'll know one of them again."

"Why don't you put him in your collection?" asked Frank with a smile, although his arm still hurt him where the electric ray had shocked it.

"I want no such fish as that round me, sir," said the professor indignantly, and ordered Ben to throw the creature overboard with his boat-hook.

After supper that night the boys hung about the decks till bedtime.

The hours pa.s.sed slowly and they amused themselves by watching the moonlit sh.o.r.es and speculating on the whereabouts of the Patagonians.

Suddenly Billy seized Frank's arm.

"Look," he exclaimed, pointing to a low ridge that stood out blackly in the moonlight.

Behind the low eminence Frank could distinctly see a head cautiously moving about, seemingly reconnoitering the two ships. In a few seconds it vanished as the apparent spy retreated behind the ridge.

"That must have been a Patagonian," said Frank.

"Just think, they are so near to us and we cannot go ash.o.r.e," sighed the professor, who was one of the group. "I wonder if they have any dogs with them?"

"I have a good mind to go, anyway," said the old man, suddenly, "I would like to write a paper on the habits of the Patagonians and how can I if I don't study them at first hand?"

"What if they chopped your head off?" asked Billy.

"They would not do that," rejoined the scientist, with a superior smile. "I have a friend who lived with them for a time and then wrote a book about them. According to him Captain Hazzard is wrong; they are not hostile, but, on the contrary, are friendly to white men."

"Then you think that Captain Hazzard doesn't know much about them?"

asked Billy.

"I did not say that," replied the professor; "but he may be mistaken just like I was about the electric ray, which I thought was a South Atlantic skate. Just the same, I mean to find out for myself," he went on. "To-night when everyone is asleep but the man on duty, I am going to watch my opportunity and go ash.o.r.e in the boat the carpenters left at the bow this afternoon. There are ropes hanging from the prow down which I can climb."

Soon after this the boys determined to turn in and, naturally, the professor's decision occupied a great deal of their conversation.

"Do you think we ought to tell the captain about what Professor Sandburr means to do?" asked Frank of the others.

"I don't think so," said Billy. "He is much older than we are and doubtless he knows what he is about. At the same time, though, I think we should watch and if he gets into trouble should try and help him out of it."

"Very well, then we will all be out on deck at midnight," said Frank, "and if we find that the professor is really serious in his intention to go ash.o.r.e in the boat we will try and stop him. If he still persists we shall have to tell the captain."

The others agreed that the course that Frank recommended was the best one, and they all decided to adopt his plan.

But the boys were heavy sleepers and besides were tired out when they sought their bunks, so that when Frank, who was the first to wake, opened his eyes it was past one in the morning. With a start the boy jumped out of bed and hastily called the others.

"We may not be too late yet," he said, as he hastily slipped into trousers, shirt and slippers.

But the boys WERE too late. When they reached the bow they could see by peering over that the boat had gone and that the professor had penetrated alone into the country of the Patagonians.

Suddenly there came a shot from the sh.o.r.e and a loud cry of:

"Help!"

"It's the professor!" exclaimed Frank; "he's in serious trouble this time."

CHAPTER XI.

A BATTLE IN THE AIR.

To raise an alarm throughout the ship was the work of a few minutes and the watchman, whose carelessness had allowed the professor to slip away unnoticed, aroused the indignation of Captain Hazzard, who blamed him bitterly for his oversight. Several shots followed the one the boys had heard and more cries, but they grew rapidly fainter and at the same time the sound of horses galloping away in the distance was heard.

"They have carried him off," cried Captain Hazzard.

"Can we not chase them and rescue him?" asked Billy, "we've got plenty of men and arms."

"That would be of little use to us," was the reply, "the Patagonians are mounted and by this time they have got such a start on us that we could never hope to catch up to them on foot."

"Not on foot," put in Frank quietly, "but there is another way."